Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-15841-2018 |
Physical state of 2-methylbutane-1,2,3,4-tetraol in pure and internally mixed aerosols | |
Lessmeier, Jorn1,2; Dette, Hans Peter1,2; Godt, Adelheid1,2; Koop, Thomas1,2 | |
2018-11-05 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:21页码:15841-15857 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | 2-Methylbutane-1,2,3,4-tetraol (hereafter named tetraol) is an important oxidation product of isoprene and can be considered as a marker compound for isoprene-derived secondary organic aerosols (SOAs). Little is known about this compound's physical phase state, although some field observations indicate that isoprene-derived secondary organic aerosols in the tropics tend to be in a liquid rather than a solid state. To gain more knowledge about the possible phase states of tetraol and of tetraol-containing SOA particles, we synthesized tetraol as racemates as well as enantiomerically enriched materials. Subsequently the obtained highly viscous dry liquids were investigated calorimetrically by differential scanning calorimetry revealing subambient glass transition temperatures T-g. We also show that only the diastereomeric isomers differ in their T-g values, albeit only by a few kelvin. We derive the phase diagram of water-tetraol mixtures over the whole tropospheric temperature and humidity range from determining glass transition temperatures and ice melting temperatures of aqueous tetraol mixtures. We also investigated how water diffuses into a sample of dry tetraol. We show that upon water uptake two homogeneous liquid domains form that are separated by a sharp, locally constrained concentration gradient. Finally, we measured the glass transition temperatures of mixtures of tetraol and an important oxidation product of alpha-pinene-derived SOA: 3-methylbutane-1,2,3-tricarboxylic acid (3-MBTCA). Overall, our results imply a liquid-like state of isoprene-derived SOA particles in the lower troposphere at moderate to high relative humidity (RH), but presumably a semisolid or even glassy state at upper tropospheric conditions, particularly at low relative humidity, thus providing experimental support for recent modeling calculations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000449324300002 |
WOS关键词 | SECONDARY ORGANIC AEROSOL ; HOMOGENEOUS ICE NUCLEATION ; ATMOSPHERIC AEROSOLS ; PHASE STATE ; RELATIVE-HUMIDITY ; 2-C-METHYL-D-ERYTHRITOL 4-PHOSPHATE ; OPTICAL-PROPERTIES ; AQUEOUS-SOLUTIONS ; GLASS-TRANSITION ; SOA PARTICLES |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26179 |
专题 | 地球科学 |
作者单位 | 1.Bielefeld Univ, Fac Chem, Univ Str 25, D-33615 Bielefeld, Germany; 2.Bielefeld Univ, CM2, Univ Str 25, D-33615 Bielefeld, Germany |
推荐引用方式 GB/T 7714 | Lessmeier, Jorn,Dette, Hans Peter,Godt, Adelheid,et al. Physical state of 2-methylbutane-1,2,3,4-tetraol in pure and internally mixed aerosols[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(21):15841-15857. |
APA | Lessmeier, Jorn,Dette, Hans Peter,Godt, Adelheid,&Koop, Thomas.(2018).Physical state of 2-methylbutane-1,2,3,4-tetraol in pure and internally mixed aerosols.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(21),15841-15857. |
MLA | Lessmeier, Jorn,et al."Physical state of 2-methylbutane-1,2,3,4-tetraol in pure and internally mixed aerosols".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.21(2018):15841-15857. |
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